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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /media/libtremor/lib/tremor_window.c | |
parent | Initial commit. (diff) | |
download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/libtremor/lib/tremor_window.c')
-rw-r--r-- | media/libtremor/lib/tremor_window.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/media/libtremor/lib/tremor_window.c b/media/libtremor/lib/tremor_window.c new file mode 100644 index 0000000000..006a1ee6b5 --- /dev/null +++ b/media/libtremor/lib/tremor_window.c @@ -0,0 +1,83 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * + * * + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * + * * + * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * + * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * + * * + ******************************************************************** + + function: window functions + + ********************************************************************/ + +#include <stdlib.h> +#include <math.h> +#include "misc.h" +#include "window.h" +#include "window_lookup.h" + +const void *_vorbis_window(int type, int left){ + + switch(type){ + case 0: + + switch(left){ + case 32: + return vwin64; + case 64: + return vwin128; + case 128: + return vwin256; + case 256: + return vwin512; + case 512: + return vwin1024; + case 1024: + return vwin2048; + case 2048: + return vwin4096; + case 4096: + return vwin8192; + default: + return(0); + } + break; + default: + return(0); + } +} + +void _vorbis_apply_window(ogg_int32_t *d,const void *window_p[2], + long *blocksizes, + int lW,int W,int nW){ + + LOOKUP_T *window[2]={window_p[0],window_p[1]}; + long n=blocksizes[W]; + long ln=blocksizes[lW]; + long rn=blocksizes[nW]; + + long leftbegin=n/4-ln/4; + long leftend=leftbegin+ln/2; + + long rightbegin=n/2+n/4-rn/4; + long rightend=rightbegin+rn/2; + + int i,p; + + for(i=0;i<leftbegin;i++) + d[i]=0; + + for(p=0;i<leftend;i++,p++) + d[i]=MULT31(d[i],window[lW][p]); + + for(i=rightbegin,p=rn/2-1;i<rightend;i++,p--) + d[i]=MULT31(d[i],window[nW][p]); + + for(;i<n;i++) + d[i]=0; +} |